74 
PSYCHE 
[August 
TABULAR VIEW OF THE THREE SUBGENERA OF PIERIS. 
PONTIA 
daplidice 
Eqq \aid singly, yellow, chang- 
ing to orange. 
PIpRIS 
rapae 
MANCcIPIUM 
brassicae 
Laid singly, not changing 
color. 
Laid in clusters of 30 to 100, 
not changing color. 
large 
round, 
Stage I. With very 
black tubercles; low, 
and flat at the edges. 
Head black. 
With forked glandular hairs. 
Larva looks dull gray-green. 
(Skin orange till fed.) 
Solitary. 
Smaller white tubercles. 
Head pale. 
With glandular hairs. 
Larva looks pale yellow. 
Solitary. 
Moderate, high-conical black 
tubercles. 
Head black. 
No glandular hairs. 
Larva looks dark gray, be- 
coming greenish. 
Social. 
Stage IT. 
Missed. 
Tubercle arrangement of 
brassicae but with glandular 
hairs. Marks as in stage ITI.! 
As before the tubercles are 
paler, smaller; the primaries 
not very contrasting;  i- 
ili forked, glandular. 
Stage III. Broad yellow sub- 
dorsal and stigmatal bands. 
All tubercles comparatively 
small, black. 
Tubercles ii very small but 
with glandular hair. 
Green, no distinet marks. 
Tubercles very — small; 
primaries (including iv & vy) 
white, secondaries green. 
Primaries equal. 
As before the tubercles are 
black, the primaries much en- 
larged. No glandular hairs. 
A narrow yellow dorsal and 
broad stigmatal bands, relatively 
higher than in Pontia. All 
tubercles very large, the second- 
aries also easily seen. 
Tubercle ii smaller than i but 
very conspicuous. 
Stage IV. The conditions of 
the last stage exaggerated; the 
tubercles smaller, stripes 
brighter. A narrow yellow 
dorsal. The tubercle above ii 
is about as large as ii. 
Conditions of last stage 
exaggerated; primaries white 
secondaries concolorous; yel- 
low dorsal and stigmatal. 
Tubercles proportionately 
smaller than even in dapli- 
dice. 
On the mid-segments laterally 
there is more black than green, 
due mostly to ii, which is very 
large. 1and i are still as large 
as the tubercle above ii. 
Stage V. As _ before. 
(Not seen). 
As before. 
(Head green after first 
stage.) 
Very little change, head is 
now spotted as in Pontia. 
1From Frohawk, ’06. 
